Issue 1453: Python does not honor "CFLAGS" environment variable (original) (raw)

This issue has been migrated to GitHub: https://github.com/python/cpython/issues/45794

classification

process

Created on 2007-11-16 18:19 by tebeka, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (8)
msg57588 - (view)	Author: Miki Tebeka (tebeka) *	Date: 2007-11-16 18:19
Setting CFLAGS environment variable do not show up in the build process, the gcc flags do not include the CFLAGS flags.
msg57589 - (view)	Author: Guido van Rossum (gvanrossum) *	Date: 2007-11-16 18:28
This depends on the version of Make used. See the man page for Make.
msg57590 - (view)	Author: Martin v. Löwis (loewis) *	Date: 2007-11-16 18:39
In all versions of make, "make CFLAGS=..." should work fine (although that's not an environment variable).
msg57591 - (view)	Author: Miki Tebeka (tebeka) *	Date: 2007-11-16 19:05
I'll try to be clearer: `./configure --help` states (at the end): Some influential environment variables: CC C compiler command CFLAGS C compiler flags LDFLAGS linker flags, e.g. -L if you have libraries in a nonstandard directory CPPFLAGS C/C++ preprocessor flags, e.g. -I if you have headers in a nonstandard directory CPP C preprocessor Use these variables to override the choices made by `configure' or to help it to find libraries and programs with nonstandard names/locations. What I've tried to do is compile Python with gprof, adding the -pg flag. So I ran `CFLAGS=-pg ./configure`, the resulting Makefile did not contained the -pg in the CFLAGS (or OPT) variables. Using `make CFLAGS=XXX` will override the CFLAGS definition in the Makefile, I just want to add to it.
msg57592 - (view)	Author: Guido van Rossum (gvanrossum) *	Date: 2007-11-16 19:24
I think you misunderstand. Passing a variable to configure makes that setting have effect *during the configure run*.
msg57594 - (view)	Author: Miki Tebeka (tebeka) *	Date: 2007-11-16 19:53
OK, let's close it then. (However note that in two projects I've checked - vim and pcre the CFLAGS environment variable do get reflected in the build process) Any "standard" way to add custom compilation flags?.
msg57595 - (view)	Author: Guido van Rossum (gvanrossum) *	Date: 2007-11-16 20:06
> Any "standard" way to add custom compilation flags?. Beats me. I'm no autoconf expert.
msg57596 - (view)	Author: Martin v. Löwis (loewis) *	Date: 2007-11-16 20:17
> Any "standard" way to add custom compilation flags?. See the README. Set OPT to influence the optimization flags; set EXTRA_CFLAGS otherwise.